"The John Letters story began in a small works in 1918 on the north bank of the River Clyde in Glasgow. Originally Letters, Logan & company, by 1923 the Company had become known as John Letters." "The 'Limited Edition' John Letters Pro F90 irons have been forged from the finest materials to create a players iron that offers truly stunning performance for the low-to-mid handicap golfer!" Exc. from Company's Website